ClickHouse/dbms/tests/queries/0_stateless/00412_logical_expressions_optimizer.sql

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DROP TABLE IF EXISTS merge_tree;
CREATE TABLE merge_tree (x UInt64, date Date) ENGINE = MergeTree(date, x, 1);
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INSERT INTO merge_tree VALUES (1, '2000-01-01');
SELECT x AS y, y FROM merge_tree;
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DROP TABLE IF EXISTS merge_tree;